Heinrich peteesef



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H. PETERSEN.

GBNTRIFUGAL CBEAMI'NG MACHINE. No. 288,732. [Patented Nov. 20,1883.

M PETERS. Piuw-mmgmpr-ln Waslllnglam D. C.

,UNITEI) STATES 7 PATENT OFFICE.

HEINRICH rErEEsEN, OF HAMBURG, GERMANY.

CENTRIFUGAL CREAMlN-G-MACHiNE.

SPECIFICATION forming part of Letters Patent No. 288,732, dated November 20, 1883.

Application filed February 15, 18831 To all whom it. may concern.-

drawings.

ing the operation of the machine.

This invention relates to a certain class of centrifugal machines used for separating liquids of different specific gravity-such as cream from milk and in which cutters or peeling-off devices are employed for removing one, several, or all separated part or parts of the liquid out of the machine, and has for its object to simplify the construction and to improve the action of such machines.-

The new or improved apparatus employed herein consists of a straight tube or pipe, furnished at the inner end' with a cutting-edge, which tube or pipe is supported by an arm or other part of the frame, in which it can be .turned round its own axis, as well as be moved forward and backward. The sharp cuttingedge of the tube is placed against the rotating ring of liquid that has to be removed from the centrifugal vessel. Consequently liquid is, by the said cutting edge, peeled off from the rotating ring and runs through the tube out of the machine. As the ,tube can be turned about its axis within the supporting-frame, a new part of the circular cutting-edge can be brought in contact with the liquid in case this should be desirable, either because one part of the said edge is warm, or in case impurities should collect against the cutting part of the edge, or on account of other circumstances which may occur to render such turning desirable. This can be done without interrupt- The forward and backward motion that can be given to the tube in the direction of its longitudinal axis provides for the adjustment of the cutter in proper position in relation to the liquid ring that has to be removed, or the forcing of the cutting-edge to a greater or less depth into the surface of the rotating ring of liquid. In case the cutting-tube is introduced into the interior of the centrifugal vessel, this vessel can, by stopping the feedingof the machine with compound liquid, fully or partlybe emp- (No model.)

I tied of its contents by gradually introducing the tube deeper into the centrifugal vessel. The forward and backward motion of the tube-cutter may be executed by giving the tube an outer thread, and by furnishing the support with a corresponding inner thread. If the tube is then turned by a hand-wheel attached to its outer end, the distance to which it is introduced into the rotating vessel toward its inner circumference may be varied; or it may be removed from out the vessel lay-turning it in reversedirection. The forward and backward motion of the tube may also be ex ecuted by a rack and pinion, or by lever transmission, or other mechanical means wel known to practical engineers.

Theinvention is illustrated by the accompanying sheet of drawings as applied to a centrifugal drum fixed to the end of a horizontal rotating shaft.

Figure 1 is a front view, partly in section; Fig. 2, a sectional plan of drum and cutter.

The cutter A consists of astraight tube, having a sharp circular edge, e, which tube is supported by a bracket, S, in which it can be turned about its own axis by a hand-wheel, R, lever, or other device, so as to bring a new part of the cutting-edge in contact with the liquid that has to be removed out of the drum, if the part before used is warm, or it is for any other reason desirable to present another part of the edge. The circumferential channeling of the exterior of the front partof the tube has for its purpose to prevent parts of the liquid that might, by splashing or otherwise, come onto the outer surface of the tube, from running down along thissurface. Such parts of liquid will drip off from the channels.

For the purpose of emptying the centrifu gal drum, partly or wholly, by cutter A, the latter can be shifted forward in its support S, so as to enter the drum more or less. may be done by giving the tube an outer thread tofit a female-thread, m, of the support, as shown in Fig. 2 of the drawings, in consequence of whichthe cutter, if turned in one direction, will enter the drum more or less, while, if turned in the other direction, it will be removed from the deeper part of the drum.

In Fig. 2 of the drawings, in full lines, the cutter is shown in its position as peeling off the This machine, while in dotted lines its position is shown when nearly all liquid contained in the drum is drawn off by this cutter. The support S is pivoted onto a vertical post or fixed pin, 2, round which it can be swung to bring the cutter into or out of acting position. 0 is a screw to fiX the support when the cutter is in working position.

I am aware that tubes have been used before for the purpose of removing liquids out of centrifugal apparatus, and I do not claim this, generally.

I am also aware that such tubes have had their ends bent into U shape, and have been adjusted longitudinally without turning, so as to project more or less into the liquid to be removed; but

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a centrifugal separating-machine of the kind herein described, the combination of a straight tube provided at the inner end with a circular cutting-edge, and a support or bracket in which the said tube is adapted to turn to present different parts of its edge in an operative position, substantially as herein described.

2. In a centrifugal separating-machine of the kind herein described, the combination, with a straight tube having acircular cuttingedge at the inner end, and the support or bracket in which it is capable of turning to bring different portions of its edge into operation, of a screw or its equivalent for projecting the said tube forward or drawing it back in said support or bracket, substantially as described.

.3. The cutter or peeling-off device, for use in a centrifugal separating-machine of the kind herein described, consisting of astraight 4o tube provided at the inner end with a circular cutting-edge, and having-immediately in rear of the inner end circumferential channels or grooves, which prevent the flow of liquid backward along the exterior of the tube, substantially as described.

HEINRICH PETERSEN. Witnesses:

F. ENGEL, F. CLAIRMONT. 

